Copper-catalyzed Mizoroki-Heck coupling reaction using an efficient and magnetically reusable Fe3O4@SiO2@PrNCu catalyst
This study intends to design and prepare a new magnetic copper catalyst and its activity was assessed by carbon-carbon coupling reactions. For this purpose, 1-[3-(trimethoxysilyl) propyl] urea (TMSPU), hydrazine and CuI were used sequentially to modify Fe3O4@SiO2 core-shell magnetic nanoparticles to obtain an efficient magnetic transition metal catalyst. Various analytical techniques were used to characterize the catalyst to show that the achieved structure and its properties are well-suited for coupling reactions. Finally, Mizoroki-Heck and Ullmann coupling reactions were performed using Fe3O4@SiO2@PrNCu catalyst. The new...
Source: Journal of Organometallic Chemistry - July 19, 2019 Category: Chemistry Source Type: research

Synthesis, characterizzation, in vitro antimicrobial and anticancer studies of new platinum N-heterocyclic carbene (NHC) complexes and unexpected nickel complexes
Publication date: Available online 16 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Kar Bee Choo, Sui Mae Lee, Wai Leng Lee, Yuen Lin CheowAbstractA series of bidendate pyridine-functionalized metal N-heterocyclic carbene (NHC) complexes with various wingtip substituents (R = methyl, phenyl and tert-butyl) had been prepared from silver oxide-mediated transmetalation method. The basic backbone of the NHC ligands were prepared in two stepwise reactions: reduction of the commercially available 2-benzoylpyridine, followed by halogenation to yield 2-(chloro(phenyl)methyl)pyridine. Subsequent reactions with ...
Source: Journal of Organometallic Chemistry - July 18, 2019 Category: Chemistry Source Type: research

Ruthenium arene complex induces cell cycle arrest and apoptosis through activation of P53-mediated signaling pathways
Publication date: Available online 16 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Jianfu Zhao, Xiang Zhang, Hongxing Liu, Zushuang Xiong, Meng Li, Tianfeng ChenAbstractRuthenium (Ru)-based complexes show promising prospect for development of anticancer agents. Among the cytotoxic Ru complexes, Ru arene complexes are famous for their comparatively high solubility in water under physiological conditions. However, more information is needed to understand the roles and effects of aquation reaction on the anticancer efficacy of these metal complexes. Herein, the aquation process of a Ru(II) arene complex [Ru(...
Source: Journal of Organometallic Chemistry - July 18, 2019 Category: Chemistry Source Type: research

Coinage metal complexes bearing fluorinated N-Heterocyclic carbene ligands
Publication date: Available online 17 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Manuela Delgado-Rebollo, Cristina García-Morales, Celia Maya, Auxiliadora Prieto, Antonio M. Echavarren, Pedro J. PérezAbstractThe synthesis of novel fluorinated symmetrical and unsymmetrical imidazolium salts as well as their corresponding coinage metal complexes is described. The silver derivatives were prepared using Ag2O as the metal source and the subsequent (NHC)AgX complexes were successfully employed in the preparation of the corresponding Cu(I) and Au(I) complexes through transmetallation reactions. H...
Source: Journal of Organometallic Chemistry - July 18, 2019 Category: Chemistry Source Type: research

Fluorinated alkali metal catalysts for the Ring-Opening Polymerization (ROP) of rac-lactide. Effect of the M···F interactions in the polymerization control
Publication date: Available online 15 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Francisco M. García-Valle, Ma Teresa Muñoz, Tomás Cuenca, Stefano Milione, Marta E.G. Mosquera, Jesús CanoAbstractA series of lithium, sodium, and potassium complexes with different fluorinated phenoxo-imine ligands [M(O-2-(RN = CH)–C6H4] [R = 2,4,6-F3C6H2; 2,3-F2C6H3; 2-FC6H4] (1–3) (a,b,c) have been studied as catalysts for the Ring-Opening Polymerization (ROP) of rac-lactide. The sodium and potassium compounds are extremely active catalysts and reach quantitative conversion...
Source: Journal of Organometallic Chemistry - July 16, 2019 Category: Chemistry Source Type: research

Hydrosilylation of nitrogen-containing organic compounds: Model studies
Publication date: Available online 16 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Aleksandra Chechelska-Noworyta, Maria Owińska, Magdalena HasikAbstract1,1,3,3-tetramethyldisiloxane (M2H) was used as the hydrosilylating agent for nitrogen-containing alkene derivatives: N-allylaniline (Naa), N-allylcyclohexylamine (Nach), N-allylpiperidine (Nap), 4-vinylpyridine (4VP) and 2-vinylpyridine (2VP). Reactions were performed in the presence of Pt0 complex (Karstedt's catalyst), in toluene, at 60 °C, for 24 h. Their course was followed by gas chromatography and FTIR spectroscopy. Final hydrosilylation p...
Source: Journal of Organometallic Chemistry - July 16, 2019 Category: Chemistry Source Type: research

Cp2TiCl2-catalyzed borylation and hydroboration of α-olefins with dichloro(diisopropylamino)borane
Publication date: Available online 10 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Liliya I. Khusainova, Leila O. Khafizova, Kirill S. Ryazanov, Tatyana V. Tyumkina, Usein M. DzhemilevAbstractThe reaction between aryl substituted α-olefins and dichloro(diisopropylamino)borane catalyzed with Cp2TiCl2 leads to trans-1-alkenyl(chlorodiisopropylamino)boranes in high yields. Aliphatic α-olefins in this reaction give borylation and hydroboration products, namely, trans-1-alkenyl(chlorodiisopropylamino)boranes and alkyl(chlorodiisopropylamino)-boranes. A proposed catalytic cycle for the Cp2TiCl2-cata...
Source: Journal of Organometallic Chemistry - July 12, 2019 Category: Chemistry Source Type: research

Chloropalladated tetranuclear and copper(I) complexes of propargylamines [RC≡CCH2NC4H8NCH2C≡CR]
Publication date: Available online 10 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Vitthalrao S. Kashid, Basvaraj S. Kote, S. Balakrishna MaravanjiAbstractThe reactions of propargylamines 1,4-bis(3-phenylprop-2-yn-1-yl)piperazine (1) and 1,4-bis(3-(trimethylsilyl)prop-2-yn-1-yl)piperazine (2) with PdCl2 and CuI is described. 1,4-Bis(3-phenylprop-2-yn-1-yl)piperazine reacts with one equivalent of PdCl2 to afford κ2-N,N-coordinated complexes [PdCl2{Me3SiC≡CCH2NC4H8NCH2C≡CSiMe3-κ2-N,N] (3) and [PdCl2{Me3SiC≡CCH2NC4H8NCH2C≡CSiMe3}-κ2-N,N] (4). The reactions of 1 and 2...
Source: Journal of Organometallic Chemistry - July 12, 2019 Category: Chemistry Source Type: research

Reactivity of 5-alkynyl-3,4-dihydro-2H-pyrroles with Au(III): Route to vinylgold(III) complexes, aurocycles by cyclisation of these complexes and ML complexes
Publication date: Available online 11 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Huy-Dinh Vu, Christelle Bouvry, Jacques Renault, Arnaud Bondon, Fabian Lambert, Thierry Roisnel, Philippe UriacAbstractThe reaction of 5-alkynyl-3,4-dihydro-2H-pyrroles (imine) with AuCl3 led to the synthesis of the vinyl gold (III) complexes 3 that could give the aurocycles 4 with an excess of AuCl3. In the base presence the dimerization of 4 was observed leading to 5. If NaAuCl4 was used as gold (III) source a ligand exchange was observed leading to the complexes 6. Nucleophilicity of both nitrogen atom and alkyne functio...
Source: Journal of Organometallic Chemistry - July 12, 2019 Category: Chemistry Source Type: research

Synthesis, biological evaluation and colorimetric sensing studies of platinum group metal complexes comprising pyrazine based thiourea derivatives
Publication date: Available online 11 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Lathewdeipor Shadap, Siewdorlang Diamai, Jaya Lakshmi Tyagi, Krishna Mohan Poluri, Werner Kaminsky, Mohan Rao KolliparaAbstractA series of complexes (1–9) were synthesized by the reaction of halide bridged metal precursors with the three pyrazine thiourea ligands L1, L2 and L3 to yield cationic as well as neutral complexes and characterized by various spectroscopic techniques. The cationic complexes are represented by the general formula [(arene)M(L)Cl] +, where L = L1, L2 and L3, arene = p-cymene, Cp* and M&n...
Source: Journal of Organometallic Chemistry - July 12, 2019 Category: Chemistry Source Type: research

Chromium carbonyl complexes with aryl mono- and oligogermanes: Ability for haptotropic rearrangement
Publication date: Available online 12 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Kirill V. Zaitsev, Igor P. Gloriozov, Yuri F. Oprunenko, Elmira Kh Lermontova, Andrei V. ChurakovAbstractThe intra- and intermolecular inter-ring η6 ⇌ η6-haptotropic rearrangements (IRHR), occurring by involving interactions to Ge atoms in arylgermanes, were investigated theoretically and experimentally. The new methods for the synthesis of non-symmetrical polyaromatic Ge compounds were elaborated. Digermane Ph3GeGeMe2Cl (2) was obtained from Ph3GeGeMe2NMe2 (1) under action of Me3SiCl. Aryl digermane Ph3GeGeMe2(&e...
Source: Journal of Organometallic Chemistry - July 12, 2019 Category: Chemistry Source Type: research

Reactions of [Os3(CO)10(μ-dppm)] and [HOs3(CO)8{μ3-Ph2PCH2P(Ph)C6H4}] with Bu3GeH: Ge–H and Ge–C bond cleavage at triosmium centers
Publication date: Available online 12 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Partha S. Roy, Md Tuhinur R. Joy, Shishir Ghosh, Derek A. Tocher, Vladimir N. Nesterov, Michael G. Richmond, Shariff E. KabirAbstractThe reactivity of the triosmium clusters [Os3(CO)10(μ-dppm)] [dppm = bis(diphenylphosphino)methane] and [HOs3(CO)8{μ3-Ph2PCH2P(Ph)C6H4}] with tributylgermanium hydride (Bu3GeH) has been investigated. Oxidative addition of Bu3GeH to [Os3(CO)10(μ-dppm)] at 110 °C affords [HOs3(CO)9(GeBu3)(μ-dppm)] (1) which undergoes further decarbonylation upon prolonged heating to yield [...
Source: Journal of Organometallic Chemistry - July 12, 2019 Category: Chemistry Source Type: research

Synthesis, characterization and catalytic activity of supported vanadium Schiff base complex as a magnetically recoverable nanocatalyst in epoxidation of alkenes and oxidation of sulfides
Publication date: Available online 9 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Mojtaba Bagherzadeh, Mohammad Bahjati, Anahita Mortazavi-ManeshAbstractA new magnetically separable nanocatalyst was successfully synthesized by immobilizing of vanadyl acetylacetonate complex, [VO(acac)2], onto silica coated magnetite nanoparticles previously functionalized with 3-aminopropyltriethoxysilane (3-APTES) and reacted by 5-bromosalicylaldehyde to form Schiff base moiety. The obtained nanocatalyst was characterized by elemental analysis (CHN), FT-IR spectroscopy, Powder X-ray diffraction (XRD), field emission scan...
Source: Journal of Organometallic Chemistry - July 10, 2019 Category: Chemistry Source Type: research

Molecular aggregations of bicyclodioxazastannone produced from multicomponent reactions involving functionalized 2-hydroxybenzaldehydes, α- or β-amino acids and a dimethyltin precursor
Publication date: Available online 10 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Tushar S. Basu Baul, Anurag Chaurasiya, Antonin Lyčka, Irán Rojas-León, Herbert HöpflAbstractA series of novel bicyclodioxazastannone derived from ONO Schiff base ligands prepared from diazenylaryl functionalized 2-hydroxybenzaldehydes and α or β-amino acetates, viz., [Me2Sn(L1)]2 (1), [Me2Sn(L2)]2 (2), [Me2Sn(L3)(MeOH)]2 (3), [Me2Sn(L4)]n (4), [Me2Sn(L5)]n⋅nH2O (5), [Me2SnL6)]2 (6), [Me2Sn(L7)] (7A), [Me2Sn(L7)]2⋅C8H10 (7B) and [Me2Sn(L8)]n (8), with variously substituted Schiff bas...
Source: Journal of Organometallic Chemistry - July 10, 2019 Category: Chemistry Source Type: research

Palladium (0) olefin complexes bearing purine-based N-heterocyclic carbenes and 1,3,5-triaza-7-phosphaadamantane (PTA): Synthesis, characterization and antiproliferative activity toward human ovarian cancer cell lines
Publication date: Available online 8 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Thomas Scattolin, Nicola Pangerc, Ilaria Lampronti, Chiara Tupini, Roberto Gambari, Lorenza Marvelli, Flavio Rizzolio, Nicola Demitri, Luciano Canovese, Fabiano VisentinAbstractA complete series of new η2-olefin palladium (0) complexes bearing purine-based N-heterocyclic carbenes or PTA (1,3,5-triaza-7-phospaadamantane) as spectator ligands have been synthetized and exhaustively characterized. The first single-crystal X-ray structure of a PTA complex of palladium (0) have been also reported. The most part of these compou...
Source: Journal of Organometallic Chemistry - July 9, 2019 Category: Chemistry Source Type: research

Supramolecular assemblies and photophysical properties of ionic homo- and heteronuclear metallophilic complexes
Publication date: Available online 5 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Noora Svahn, Ingrid Sanz, Kari Rissanen, Laura RodríguezAbstractThe synthesis of two dinuclear ionic complexes with chemical formula [Au(PR3)2][Au(C≡CC5H4N-4)2] that contain the water soluble phosphines, PR3, PTA (1, 3,5-triaza-7-phosphaadamantane, 1) and DAPTA (3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane, 2) is herein described. The differences on their intermolecular reorganization have been analyzed and compared with the previously reported for the neutral complexes [Au(PR3)(C≡CC5H4N-4)]. It...
Source: Journal of Organometallic Chemistry - July 7, 2019 Category: Chemistry Source Type: research

Synthesis and properties of dimethylpalladium complex with new PS3-type tripodal tetradentate ligand
Publication date: Available online 4 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Nobuhiro Takeda, Rin Oma, Yuki Kogure, Fumiaki Sakakibara, Yusuke Tanaka, Masafumi UnnoAbstractDimethylpalladium complex bearing PS3-type tripodal tetradentate ligand, [PdMe2{P(C6H4-2-S-i-Pr)3}], was synthesized by the reaction of [PdCl{P(C6H4-2-S-i-Pr)3}]X (X = Cl, BF4) with methyllithium (Br free). The dimethylpalladium complex reacted with an equimolar amounts of HCl to give the corresponding chloromethylpalladium complex, [PdClMe{P(C6H4-2-S-i-Pr)3}], while the similar reaction using 2 M amounts of HCl afforded the ...
Source: Journal of Organometallic Chemistry - July 6, 2019 Category: Chemistry Source Type: research

Synthesis, structure and dual-stimulus-responsive luminescence switching of a new platinum(II) complex based on 3-trimethylsilylethynyl-1,10-phenanthroline
Publication date: Available online 4 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Jiajia Kang, Jun Ni, Yanqin Li, Jianjun ZhangAbstractA new diimine-platinum(II) complex, Pt(PhenC≡CSiMe3)(C≡C-C6H4-3-F)2 (1) based on 3-trimethylsilylethynyl-1,10-phenanthroline (PhenC≡CSiMe3), were synthesized and characterized. Two solvated crystals, 1·1/2(ClCH2CH2Cl) and 1·CHCl3 exhibited dual-stimulus-responsive color and luminescence switching behaviors triggered by heating or mechanical grinding. Upon heating, the color and luminescence of both complexes were changed to red with luminesc...
Source: Journal of Organometallic Chemistry - July 6, 2019 Category: Chemistry Source Type: research

A practical synthesis of quinazolinones via intermolecular cyclization between 2-halobenzamides and benzylamines catalyzed by copper(I) immobilized on MCM-41
Publication date: Available online 4 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Nan Yan, Chongren You, Mingzhong CaiAbstractThe heterogeneous tandem N-arylation/oxidative C–H amidation of 2-halobenz- amides and benzylamines was achieved in DMSO at 110 or 120 °C by using an MCM-41-immobilized l-proline copper(I) complex [MCM-41-l-Proline-CuBr] as the catalyst and air as the oxidant, yielding a variety of quinazolinone derivatives in good yields. The new MCM-41-l-Proline-CuBr catalyst can easily be prepared from commercially readily available and inexpensive reagents and recovered by filtratio...
Source: Journal of Organometallic Chemistry - July 6, 2019 Category: Chemistry Source Type: research

Increasing Lewis acidity in perchlorophenyl derivatives of antimony
Publication date: Available online 3 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Ma Ángeles García-Monforte, Miguel Baya, Daniel Joven-Sancho, Irene Ara, Antonio Martín, Babil MenjónAbstractThe improved synthesis of the homoleptic perchlorophenyl stibine (C6Cl5)3Sb (1a) has enabled us to obtain detailed spectroscopic and structural information. In contrast to the planar structure shown by the nitrogen homologue (C6Cl5)3N, the antimony compound 1a shows unmistakable pyramidal structure (C–Sb–C 100.9(2)°, av.) with slightly elongated Sb–C bonds (219.6(4) pm...
Source: Journal of Organometallic Chemistry - July 4, 2019 Category: Chemistry Source Type: research

Editorial Board
Publication date: 15 September 2019Source: Journal of Organometallic Chemistry, Volume 896Author(s): (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - July 3, 2019 Category: Chemistry Source Type: research

Graphical abstract TOC continued
Publication date: 15 September 2019Source: Journal of Organometallic Chemistry, Volume 896Author(s): (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - July 3, 2019 Category: Chemistry Source Type: research

Graphical abstract TOC
Publication date: 15 September 2019Source: Journal of Organometallic Chemistry, Volume 896Author(s): (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - July 3, 2019 Category: Chemistry Source Type: research

Gold(I)-catalyzed [4 + 1]/[4 + 3] annulations of diazo esters with hexahydro-1,3,5-triazines: Theoretical study of mechanism and regioselectivity
Publication date: 1 October 2019Source: Journal of Organometallic Chemistry, Volume 897Author(s): Luo-yi Zhou, Xian-ming Guo, Zhong-chao Zhang, Juan LiAbstractHexahydro-1,3,5-triazines are often used as formaldimine precursors. The recent success of Sun et al. (Angew. Chem. Int. Ed., 2016, 55, 11867) in achieving gold-catalyzed [4 + 1]/[4 + 3] annulations of hexahydro-1,3,5-triazines with diazo esters, in which the hexahydro-1,3,5-triazine is directly used as the 1,4-dipole in the annulation, represents a breakthrough in mechanistic studies. In the present work, density functional theory (DFT) calc...
Source: Journal of Organometallic Chemistry - July 3, 2019 Category: Chemistry Source Type: research

A facile method to introduce iron secondary metal centers into metal–organic frameworks
Publication date: Available online 1 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Derek A. Deming, Matthew J. Hurlock, Xiaoyu Li, Kyle W. Kriegsman, Guodong Ding, Xiaofeng Guo, Qiang ZhangAbstractHerein, we report the successful incorporation of iron (0) species into a 2, 2′-bipyridine functionalized metal–organic framework (MOF) (UiO-67-bpydc). Considering the limited window size of the MOF, the smaller molecule, iron pentacarbonyl was used to introduce iron (0) to coordinate to the backbone of the MOF. The newly generated material contains the iron coordinated linker, Fe(CO)3(bpydc), which w...
Source: Journal of Organometallic Chemistry - July 1, 2019 Category: Chemistry Source Type: research

Synthesis and characterization of binuclear Pt(IV) complexes and tetranuclear mixed valence complexes of Platinum(II)-Platinum(IV)
Publication date: Available online 29 June 2019Source: Journal of Organometallic ChemistryAuthor(s): José M. Casas, Beatriz E. Diosdado, Juan Forniés, M. Ángeles García-Monforte, Raquel Laporta, Antonio Martín, Milagros TomásAbstractThe binuclear platinum(IV) complexes [NBu4]2[PtIV2(μ-Cl)2(C6F5)4Cl4] (2) and [PtIV2(μ-C8H6N4)2(C6F5)4Cl4] (4) have been synthesized by oxidative addition of chlorine to the binuclear platinum(II) species, but [NBu4]2[PtIV2(μ-OH)2(C6F5)4Cl4] (3) has been synthesized by substitution of the chloride bridges of the platinum(IV) complex. The square ...
Source: Journal of Organometallic Chemistry - June 30, 2019 Category: Chemistry Source Type: research

Naphthalene diimide carrying four ferrocenyl substitutes as an electrochemical indicator of tetraplex DNA aiming at cancer diagnosis
Publication date: Available online 29 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Shinobu Sato, Atsuhito Kajima, Hisashi Hamanaka, Shigeori TakenakaAbstractNaphthalene diimide carrying four ferrocenyl substituents, tFND1 and tFND2, were newly synthesized to expect the improved binding affinity for tetraplex DNA and specific electrochemical signal generation. tFND2 shows the 1:2 binding to tetraplex A-core DNA, which has a part of human telomere sequence based on circular dichroism spectra, and the current increase of tFND2 on the tetraplex DNA-immobilized electrode was 13.5-times higher than that on the ...
Source: Journal of Organometallic Chemistry - June 30, 2019 Category: Chemistry Source Type: research

Synthesis and characterization of platinum(II) polymetallaynes functionalized with phenoxazine-based spacer. A comparison with the phenothiazine congener
Publication date: Available online 27 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Wai-Yeung Wong, Li Li, Lei WangAbstractA new series of soluble, solution-processable metallopolyynes of platinum(II) functionalized with electron-rich phenoxazine–oligothiophene rings and their corresponding dinuclear model complexes were synthesized and characterized. The influence of the inclusion of thienyl rings along the polymer chain on the optical, electronic and photovoltaic properties of these metallopolymers was studied. The evolution of the singlet and triplet excited states in these metal-based materials w...
Source: Journal of Organometallic Chemistry - June 28, 2019 Category: Chemistry Source Type: research

Co(cyclam) alkynyl complexes of gem-DEE-aryl: Synthesis, molecular and electronic structures
Publication date: Available online 27 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Tyler J. Azbell, Susannah D. Banziger, Brandon L. Mash, Tong RenAbstractReported in this contribution are the syntheses of mono-alkynyl complexes [Co(cyclam)(gem-DEE-Ar)Cl]Cl (cyclam = 1,4,8,11-tetraazacycloctetradecane; gem-DEE = geminal-diethynylethene) with Ar as either –C6H4-4-NO2 (1) or –C6H4-4-NMe2 (2) from the reactions between [Co(cyclam)Cl2]Cl and H-gem-DEE-Ar under weak base conditions. Further reaction between compound 1 and Li-gem-DEE–C6H4–4-NMe2 at −78 °C afforded the...
Source: Journal of Organometallic Chemistry - June 28, 2019 Category: Chemistry Source Type: research

Gold(I)-catalyzed [4 + 1]/[4 + 3] annulations of diazo esters with hexahydro-1,3,5-triazines: Theoretical study of mechanism and regioselectivity
Publication date: Available online 25 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Luo-yi Zhou, Xian-ming Guo, Zhong-chao Zhang, Juan LiAbstractHexahydro-1,3,5-triazines are often used as formaldimine precursors. The recent success of Sun et al. (Angew. Chem. Int. Ed., 2016, 55, 11867) in achieving gold-catalyzed [4 + 1]/[4 + 3] annulations of hexahydro-1,3,5-triazines with diazo esters, in which the hexahydro-1,3,5-triazine is directly used as the 1,4-dipole in the annulation, represents a breakthrough in mechanistic studies. In the present work, density functional theory (DFT) calcul...
Source: Journal of Organometallic Chemistry - June 27, 2019 Category: Chemistry Source Type: research

Copper-catalyzed Mizoroki‐Heck coupling reaction using an efficient and magnetically reusable Fe3O4@SiO2@PrNCu catalyst
This study intends to design and prepare a new magnetic copper catalyst and its activity was assessed by carbon-carbon coupling reactions. For this purpose, 1-[3-(trimethoxysilyl) propyl] urea (TMSPU), hydrazine and CuI were used sequentially to modify Fe3O4@SiO2 core-shell magnetic nanoparticles to obtain an efficient magnetic transition metal catalyst. Various analytical techniques were used to characterize the catalyst to show that the achieved structure and its properties are well-suited for coupling reactions. Finally, Mizoroki‐Heck and Ullmann coupling reactions were performed using Fe3O4@SiO2@PrNCu catalyst. The n...
Source: Journal of Organometallic Chemistry - June 27, 2019 Category: Chemistry Source Type: research

Synthesis and characterization of cyclopentadienyl sulfur niobium complexes
Publication date: Available online 26 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Manuel Gómez, Cristina Hernández-Prieto, Avelino Martín, Miguel Mena, Cristina SantamaríaAbstractA trimetallic sulfide cluster [Nb3(η5-C5Me5)3Cl3(μ3-Cl) (μ-S)3(μ3-S)] (2) has been synthesized from the reaction of [Nb(η5-C5Me5)Cl4] (1) with (Me3Si)2S in a 4:3 ratio by the release of SiClMe3. The trinuclear nature of complex 2 has been established by single crystal X-ray diffraction analysis. Thermal treatment of 2 with SiH3Ph generated the dinuclear niobium(IV) complex [Nb2(η5...
Source: Journal of Organometallic Chemistry - June 27, 2019 Category: Chemistry Source Type: research

Agro waste derived nanosilica supported Pd(ll) complex: A protocol for copper free Sonogashira reaction in water
Publication date: Available online 24 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Rajjyoti Gogoi, Rituraj Saikia, Geetika BorahAbstractA palladium (II) complex immobilized onto nanosilica(Pd-imine@nanoSiO2) has been developed and evaluated as a highly efficient, retrievable catalyst for carbon-carbon triple bond activation reactions between aryl halides and terminal alkynes. Nanosilica has been derived from rice husk by simple and eco-compatible methodology. The catalyst has been extensively characterized by techniques such as FT-IR, UV–vis, powder XRD, XPS, SEM-EDX, thermogravimetric analysis, BET...
Source: Journal of Organometallic Chemistry - June 25, 2019 Category: Chemistry Source Type: research

Environmentally benign synthesis of pyranopyrazole derivatives by cobalt Schiff-base complexes immobilized on magnetic iron oxide nanoparticles
Publication date: Available online 24 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Behrouz Shaabani, Hossein Maleki, Jamshid RakhtshahAbstractIn this work, an efficient and straight procedure has been described for one-pot three-component synthesis of pyranopyrazole derivatives in the presence of a new cobalt Schiff-base complex immobilized on silica‐coated Fe3O4 nanoparticles as a reusable catalyst. This new catalyst was characterized by different techniques, such as Fourier transform infrared (FT‐IR), X‐ray powder diffraction (XRD), field‐emission scanning electron microscopy (FE-SEM), energy‐...
Source: Journal of Organometallic Chemistry - June 25, 2019 Category: Chemistry Source Type: research

σ-Acetylide complexes for biomedical applications: Features, challenges and future directions
Publication date: Available online 22 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Ashanul Haque, Rayya A. Al-Balushi, Muhammad S. KhanAbstractMono-, di- and polynuclear metal alkynyl or σ-acetylide complexes have attracted a great deal of interest due to their multi-dimensional applications. In the past few decades, several small to medium sized neutral and charged metal acetylides have been synthesized and assessed for various biomedical applications. This review explores the progress made in the design and development of rigid-rod type η1-σ-alkynyl complexes for therapeutic (viz. antica...
Source: Journal of Organometallic Chemistry - June 24, 2019 Category: Chemistry Source Type: research

Reductive coupling of diisopropylcarbodiimide by a dirhenium carbonyl complex
Publication date: Available online 24 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Richard D. Adams, Poonam Dhull, Joseph Parr, Jonathan D. TedderAbstractThe reaction of Re2(CO)8(μ-H)[μ-η2-C(H) = C(H)Bun] with N,N′-diisopropylcarbodiimide yielded the new rhenium diamidinate complex [Re(CO)4]2[(μ-C2(N{iPr})4], 2, in 59% yield that was formed by the reductive coupling of two of carbodiimide molecules at the central carbon atom. The diamidinate ligand is nonplanar and four iminyl nitrogen atoms are coordinated to two Re(CO)4 groups in two chelating groups that have formed five-membered...
Source: Journal of Organometallic Chemistry - June 24, 2019 Category: Chemistry Source Type: research

Heavy alkaline earth π-complexes with doubly-reduced polycyclic aromatic hydrocarbons of variable sizes
Publication date: Available online 21 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Andrew Uresk, Natalie J. O'Neil, Zheng Zhou, Zheng Wei, Marina A. PetrukhinaAbstractBarium (II) π-complexes with two planar polycyclic aromatic hydrocarbons (PAHs), anthracene and fluoranthene, have been prepared by direct alkaline earth metal reduction reactions in THF in the presence of 1,2-diiodoethane (DIE), used as an activator. The products have been crystallographically characterized to reveal their mixed-ligand composition, {[BaI(THF)3]22+[C14H10]2–} (1) and {[BaI(THF)3]22+[C16H10]2–} (2). A similar s...
Source: Journal of Organometallic Chemistry - June 22, 2019 Category: Chemistry Source Type: research

Triphenylantimony(V) catecholato complexes with 4-(2,6-dimethylphenyliminomethyl)pyridine. Structure, redox properties: The influence of pyridine ligand
Publication date: Available online 21 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Ludmila S. Okhlopkova, Andrey I. Poddel'sky, Ivan V. Smolyaninov, Georgy K. Fukin, Nadezhda T. Berberova, Vladimir K. Cherkasov, Gleb A. AbakumovAbstractThe complexation of triphenylantimony(V) catecholates (3,6-DBCat)SbPh3 (1), (4,5-pip-3,6-DBCat)SbPh3 (2) and (4,5-Cl2-3,6-DBCat)SbPh3 (3) with neutral 4-(2,6-dimethylphenyliminomethyl)pyridine (Py-CH=N–Ar) leads to the formation of hexacoordinated complexes (3,6-DBCat)SbPh3·(Py-CH=N–Ar) (4), (4,5-pip-3,6-DBCat)SbPh3·(Py-CH=N–Ar) (5) and (4,5-...
Source: Journal of Organometallic Chemistry - June 22, 2019 Category: Chemistry Source Type: research

Rhodium-catalyzed formation of silylcarbamates from the reaction of secondary amines with CO2 and hydrosilanes
Publication date: Available online 20 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Jefferson Guzmán, Adrián Torguet, Pilar García-Orduña, Fernando J. Lahoz, Luis A. Oro, Francisco J. Fernández-AlvarezAbstractThe reaction of (4-methyl-pyridine-2-iloxy)dimethylsilane (NSiMe–H, 1) with [RhCl(coe)2]2 gives the rhodium(III) complex [Rh(Cl)(κ2-NSiMe)] (2), which reacts with a stoichiometric amount of AgCF3CO2 to afford [Rh(κ2-CF3CO2)(κ2-NSiMe)2] (3). Complexes 2 and 3 have been fully characterized by elemental analysis and NMR spectroscopy. The solid-st...
Source: Journal of Organometallic Chemistry - June 21, 2019 Category: Chemistry Source Type: research

Evaluating ferrocene ions and all-ferrocene salts for electrochemical applications
This report presents four “all-ferrocene” salts comprised of ferrocene anions and cations and evaluates their solubility and electrochemical properties. The four salts are formed via metathesis reactions employing the (ferrocenemethyl)trimethylammonium cation and mono and bis sulfonate or carboxylate ferrocene anions. We observed that the potentials of the ferrocene components was not only dependent on the substituent, but also on the solvent medium. In particular, the sulfonate and carboxylate ferrocene anions exhibited significant shifts in redox potential between water, propylene carbonate (PC), and DMF. Mos...
Source: Journal of Organometallic Chemistry - June 21, 2019 Category: Chemistry Source Type: research

Synthesis, cytotoxicity and antineoplastic activities of novel acridine-based platinum(II) organometallic complexes
Publication date: Available online 21 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Nur Amajeida Ismail, Abbas Abdulameer Salman, Mohd Sukeri Mohd Yusof, Siti Kamilah Che Soh, Khomaizon Abdul Kadir Pahirulzaman, Hapipah Mohd Ali, Rozie SaripAbstractTwo new platinum(II) complexes incorporating acridine ligands with aniline moieties were successfully synthesised and characterised. The acridine-based ligands were synthesised by means of Ullmann's condensation. The reaction of cis-[PtCl2(DMSO)2] with the aforementioned ligand in a specified mol ratio gives 9-phenylaminoacridine cis-dichloro(dimethylsulfoxide)-...
Source: Journal of Organometallic Chemistry - June 21, 2019 Category: Chemistry Source Type: research

Computational study on the catalyst-controlled synthesis of C2-substituted quinolines through the annulation of 2-vinylanilines and alkynoates
Publication date: Available online 20 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Jing Zhang, Jing-Ning Lv, Fengyue Zhao, Jiaying SunAbstractDensity functional theory (DFT) calculations were employed to study the reaction mechanisms of the synthesis of C-2 functionalized indole/quinoline catalyzed by TfOH/Pd(OAc)2. Our calculated results verify the experimental phenomena that the selectivity for this reaction is catalyst-controlled. The product is C-2 functionalized indole by employing the sole catalyst TfOH. While the product will become 4-phenylquinoline-2-carboxylate by adding another catalyst TfOH. T...
Source: Journal of Organometallic Chemistry - June 20, 2019 Category: Chemistry Source Type: research

Direct C-H bond (Hetero)arylation of thiazole derivatives at 5-position catalyzed by N-heterocyclic carbene palladium complexes at low catalyst loadings under aerobic conditions
Publication date: Available online 17 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Bei-Bei Ma, Xiao-Bing Lan, Dong-Sheng Shen, Feng-Shou Liu, Chang XuAbstractA highly efficient and practical protocol has been developed for the synthesis of 5-(hetero)arylated thiazole derivatives via an N-heterocyclic carbene palladium (Pd-NHC) complex catalyzed direct C-H arylation reaction. Utilization of this methodology, the arylation of substituted thiazoles with (hetero)aryl bromides efficiently proceeded at low catalyst loading (0.1–0.05 mol%) and under aerobic conditions. A variety of (hetero)aryl bromides,...
Source: Journal of Organometallic Chemistry - June 18, 2019 Category: Chemistry Source Type: research

Synthesis and investigation of catalytic activity of phenylene – And biphenylene bridged bimetallic Palladium-PEPPSI complexes
Publication date: Available online 18 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Fatma İmik, Sedat Yaşar, İsmail ÖzdemirAbstractA series of phenylene and biphenylene-bridged N-heterocyclic carbene (NHC) and their bimetallic NHC–Pd-PEPPSI complexes were reported and fully characterized by 1H NMR, 13C NMR, HRMS, FTIR, and elemental analysis. The N tags with different electronic and steric properties were used on the synthesis of bridged bimetallic NHC–Pd-PEPPSI (PEPPSI: Pyridine Enhanced Precatalyst Preparation Stabilization Initiation) complexes. The catalytic properties of the bridge...
Source: Journal of Organometallic Chemistry - June 18, 2019 Category: Chemistry Source Type: research

New olefin metathesis catalyst bearing N-mesitylimidazole and nitrate ligands – Synthesis, activity, and performance in aqueous media
Publication date: Available online 16 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Marta Malinowska, Mariana Kozlowska, Agnieszka Hryniewicka, Jacek W. MorzyckiAbstractA new 18-electron ruthenium complex, where ruthenium catalytic center is coordinated with the N-mesitylimidazole and nitrate ligands, as well as o-isopropoxystyrene moiety, is reported. The synthesis and detailed characterization of the Ru complex, together with density functional theory calculations (DFT), are presented. The complex is air- and moisture-stable, although has weak catalytical activity in the model metathesis reactions. Howev...
Source: Journal of Organometallic Chemistry - June 18, 2019 Category: Chemistry Source Type: research

Synthesis and characterization of unsaturated Manganese(I) and Rhenium(I) dicarbonyl complexes supported by an anionic PNP pincer
Publication date: Available online 15 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Alex J. Kosanovich, Wei-Chun Shih, Oleg V. OzerovAbstractSyntheses of Re and Mn carbonyl complexes of the diarylamido/bis(phosphine) PNP pincer ligand are reported. The saturated (PNP)Re(CO)3 and (PNP)Mn(CO)3 react cleanly with HBr in acetic acid to undergo decarbonylation with concomitant addition of HBr across the N-M bond. The resultant (PNHP)MBr(CO)2 (M = Mn or Re) complexes can be dehydrobrominated with trimethylamine to yield the unsaturated (PNP)M(CO)2. (PNP)Re(CO)2 has high affinity for CO and abstracts CO from ...
Source: Journal of Organometallic Chemistry - June 16, 2019 Category: Chemistry Source Type: research

Synthesis, characterization and electrochemical behaviour of dimethyleneamine-bridged methylated and non-methylated biferrocenyl derivatives
Publication date: Available online 15 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Raquel Sevilla, Marta Herrero, Beatriz Alonso, M. Pilar García-Armada, Manuel Algarra, Carmen M. CasadoAbstractTwo dimethyleneamine-bridged octamethylated and non-methylated biferrocenyl complexes, compounds 1 and 2, have been synthesized and characterized by 1H, 29Si{1H} and 13C{1H} NMR spectroscopy, and mass spectrometry. The redox activity of the ferrocenyl centers in 1 and 2 has been characterized by cyclic voltammetry in dichloromethane containing [n-Bu4N][PF6], [n-Bu4N][B(C6F5)4] or [n-Bu4N]Cl as electrolyte su...
Source: Journal of Organometallic Chemistry - June 16, 2019 Category: Chemistry Source Type: research

Room temperature fast synthesis four-membered red iridium(III) complexes containing Ir–S–P–S structures for OLEDs
Publication date: Available online 15 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Ning Su, Cheng-Zhen Shen, You-Xuan ZhengAbstractOne S atom contained ligand triethylamine salt of diphenylphosphinodithioic acid (dpss) was firstly developed for two four-membered red-emitting iridium(III) complexes with Ir–S–P–S structures, (tfmpiq)2Ir(dpss) and (tfmpqz)2Ir(dpss), in which 1-(4-(trifluoromethyl)phenyl)isoquinoline (tfmpiq) and 4-(4-(trifluoromethyl)phenyl)quinazoline (tfmpqz) were employed as the cyclometalated ligands, respectively. Owing to strong bonding ability of sulfur and iridium a...
Source: Journal of Organometallic Chemistry - June 16, 2019 Category: Chemistry Source Type: research

Synthesis and reactivity of phosphine-arenesulfonate Palladium(II) alkyl complexes that contain methoxy substituents
Publication date: Available online 14 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Qian Liu, Richard F. JordanAbstractPhosphine-arenesulfonate ligands that contain 1-3 methoxy substituents on the benzo linker, P(2-OMe-Ph)2(2-SO3Na-5-OMe-Ph) (Na[1a]), P(2-MeO-Ph)2(2-SO3Na-4,5-(OMe)2-Ph) (Na[1b]) and P(2-MeO-Ph)2(2-SO3Li-3,4,5-(OMe)3-Ph) (Li[1c]) were synthesized and isolated in 52–85% yield. Reaction of Na[1a,b] and Li[1c] with (COD)PdMeCl and pyridine generates the corresponding (PO)PdMe(pyridine) complexes 2a-c. 2a and 2b were isolated in crystalline form in 59% and 86% yield, respectively, while 2...
Source: Journal of Organometallic Chemistry - June 15, 2019 Category: Chemistry Source Type: research